Sample-taking device.



R. D. DOUBS.

SAMPLE TAKiNG DEVICE.

APPLICATION FILED xuLvl5.19|a,

Patented Feb. 25, 1919.

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H. D. DODDS.

SAMPLE TAKING DEVICE.

APPLlcArloN FILED luLY 15. Isls.

1,295,1 34. Patented Feb. 25, 1919.

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EEDUSD.` DODDS, 0F BUMBLE, TEXAS.

BAIPLE-TAKIN G DEVISE.

Epecication of Letters Patent.

. Patented Feb. 25, 1919.

Application led July 15. 1918. Serial No. 244.932.

To all 'whom tvmay concern:

Be it known that I, REnUs D. Donne, a citizen of the United States, residin at Humble, in the county of Harris and tate of Texas, have invented certain new and useful Improvements in Sample-Taking Deof which the following is a specification.

This invention relates to new and useful im rovements in a sample taking device.

he object of the invention is to provide a device of the character described, for obtaining samples of the formation through plo ed. Y Iig. 8, shows which the drill b it is passing as the boring of the well progresses.

In drilling wells, particularly oil wells, it is often desirable to obtain samples of the formation for the purpose of determining the presence or absence of oil or other minerals. This device Ahas been provided for the urpose of obtainin accurate samples of e formation throng which thefbit is passing at any depth, and withdrawing the same to the surface for inspection during the process of drilling a well.

With the above and other objects in view, the invention has particular relation to certain novel features of construction, arrangements of parts, and use, an example of which is given in this specification and illustrated in the accompanying drawings, wherein:

Figures 1, 2 and 3, taken in combination, show a vertical sectional view of the device; Fig. 1, showin the upper-portion, thereof, Fig. 2, the middle portion, and Fig. 3,'showing` the lower end thereof.

ig. 4, shows a transverse sectional view, taken on the line 4 4, of Fig. 1.

Fig. 5, shows a vertical sectional view of the boringtool.

Fig. 6, shows a lower end view thereof.

Fig. 7, shows a plan view of the trap ema side elevation of the trap. Fig. 9, shows a plan view of the trap anchor. L

Fig. 10, shows a vertical sectional `view thereof.

Fig. 11, shows a vertical sectional view of` the implement employed, for lowering the device in the stem, and Fig. 12, shows, a vertical sectionalliview of a fishing tool for withdrawingv the device from the well. A

Referring nowmnore particularly to the drawings, wherein like numerals of reference designate similar parts in each of the figures, the numeral 1, refers to a tubular drill stem, havin the bit 2 secured to the lower end thereo in the usual manner. The bit has a vertical bore 3, therethrough, for the purpose hereinafter described, and whose upper end is iared at 4.

The numeral 5, refers to a tubular barrel which extends through the bore 3,0 f the bit,

- said barrel having an enlarged section forming a conical shaped shoulder 6, which normally rests in the flared portion 4, of the bore 3. Threaded Onto the lower end of the barrel 5 is the boring'tool 7, whose lower end is formed into radiating cutters 8, and this boring tool has a central passageway 9, which ares upwardly and threaded into which is the annular anchor 10, to which anchor the trap, hereinafter described, is attached. This. trap consists of a` hood which is formed of the sections 11, 11, 11. These sections are concave, in form, and when the trap is closed, their adjacent edges fit closely together. p Said sections are hinged to the anchor 10,`so as to permit them to open to permit the passage of samples, upwardly throu h the boring tool. The hinged connection o each` section 11,withthe anchor 10, is formed by means of an.extension 12, integral with the section 11 and which fits into the slot 13, out through the upper edge o f the anchor. The lower end of the extension 12 has the laterally extending projections 14, 14, which lie in a transverse groove 15, in the anchor 10, forming an extension of the corresponding slot 13. When the sections 11 of the trap are thus attached to the anchor 10, and said anchor screwed into the boring tool 7, the sections 11 are thereby secured against detachment. Secured to the back of each trap section is a fiat sprin 16, whose free end normally rests against tle inner wall of the boring tool 7 to hold the sections of the trap in closed position. The barrel 5 has a checkvalve 7, near itsupper end and above this has fluid outletl passageways 18. The upper end of the barrel 5 is threaded upon t e lower end of the rod 19. This rod ,extends up through the tubular member 20,. and its upper. end operates through an inserted couplin 21, carried by the upper end of the mem r 20, and threaded onto the upper end of the rod 19, is the enlar ed nut 22, rovided to-engage against e upper en of sprin the coupling 21, to limit the downward movement of the rod 19. A section of the rod 19 within the member 20 is reduced, forming the annular shoulder 23, and surrounding said reduced portion and interposed between said shoulder and the coupling 21, is the strong coil spring 24. The tubular member 20 has oppositely disposed vertical slots 25, 25, and a key 26, is fitted in an alined slot in the rod 19, and fastened therein by means of the pin 27, said key projecting outbeyond the rod 19 on each side and fitting into the slots 25, 25. In case the boring tool 7 should encounter hard formation, which it cannot pierce, the 24 will yield, in effect, permitting the withdrawal of the boring tool 7, up into the bit 2, and the bit thus, in effect, reinforces said tool and prevents it from becoming broken olf. To the upper end of the coupling 21, is attached a connecting joint 28, to the upper end of which is attached an interna collar 29, and threaded onto the upper end of this collar is the tubular anchor 30, having the oppositely disposed vertical slots 31, 31, through whichl the anchor blades 32, 32, project. The blades are pivoted to the anchor 30 at their lower ends, by means of'a bearing pin 33, which passes through said anchor and through alined bearings in the lower ends of said blades. The coupling 29 has a central bearing 34, whose upper end is enlarged, forming the annular shoulder- 35. Arstem 36 operates in the bearing 34, and the upper end of this stem is formed into i .a conical shaped head 37. Sui-rounding the stem 36, andinter Sed between the shoulder 35 and the head 3 is the strong coilV spring 38. The lower ends of the blades 32, are formed linto fin rs 39, 39, and the sprin 38 `normally ho ds the head 37, rojecte between said lingers 39, so as lto. old the blades o n, and rejected through theslots 31, as s own in 1, and riveted to the inner side of the rill stem arel the o positely disposed vertical ribs 40, 40, w ch engage a inst said blades, as the stem rotetes, an force the same to rotate therewith, thus driving the boring tool 7. The

upper end of the tubular anchor 30 carries a gland 41, through which the rod 42 extends: The lower end of the rod is enlarged forming the annular shoulder 43, and the enlarged head 44, said head fitting within the anchor 30, with sulcient clearance to allow it to move up and down without friction.

Screwed upon the upper end of the rod 42 1s the coupling 45, and surrounding the rod 42 and interposed between the gland' 4 1 and the cou ling 45 is a stron coil spring 46. 'olhe coup ing 45 is extended upwardly, formi the reduced neck 47, and the annular s oulder 48, and threaded upon the upper end of the nipple is a cylindrical head 49, whose upper end is conical shaped,

and having the annular groove 50. Within the drill stem 1, are the fingers 51, 51, whose upper en ds are hinged to the anchor within the drill stem. The hinged connections of said fingers to said drill stem are formed in the same manner as the hinged connections of the trap sections 11, to the The lower end of the For the purpose of letting 'the device down into the drill stem, I have provided an implement as shown in Fig. 11, wherein the numeral 53 refers to a tube having a spider 54, fixed therein near its lower end, with a central orifice 55, through which the rod 56, passes, said rod having an enlarged head 57, at its upper end to prevent its detachment from the spider. The lower end of the rod has a head 58, to the opposite sides of which are pivoted the levers 59, 59, the lower ends of said levers being turned inwardly, forming the fingers 60, 60, provided to engage in the groove 50, of the head 49. The upper ends of the levers are 'arcuate in form, being curved outwardly and interposed between them is the push spring 61, which passes through the rod 56, and is provided to hold the fingers 60 in engagement in said groove. In order to lower the device, into the' well, the fingers 54 are engaged over said head as lshown in Fig. 7, and the entire device then lowered through the medium of a hailing line attached to the tube 53, the head 57 len'gag'in against the spider 55. The boring tool is thus projected through the bit 2, until the shoulder 6 fits in the flared recess 4. The weight of the implement will then be sustained by the head 49, and is suilicient to overcome the resistance of the springr 46, and force end of the head 4 4, will be forced between f the upper ends of the4 blades 42 to hold them locke in engaged position. 'As the tubing 53 is further lowered, it will ass over the upper ends of the levers 59, 9, and force them together, di aging the ngers 60 from the ,head 49. h `ereupon lthe up er endof the rod 56 contacts against the s 72, xed thereabove on the tubin A58 endsof the at the same time, catches 62, 6 by the outer sides of the upper said levers 59, engage in corresponding recesses 63, 63, in the inner side of the tubing 53, and the implement may be then lifted out of the well, leaving the device in position for operation in the drill stem 1.

When the drill stem is rotated, the ribs 40 will engage against the outwardly projecting edges of the blades 32, and will force the sample taking device to rotate with said stem. As shown in Fig. 3, the boring tool 7 runs in advance of the bit 2, and as it passes through the formation, samples of said formation will pass up through the passageway 9, forcing the sections 11 of the trap backwardly and gaining admittance to the interior of the barrel 5. The surplus water admitted passes up through the check valve 17 and out through the water passagewaysl 18.

In Fig. 12, I have shown a form of fishing tool for withdrawing the device from the drlll stein, after the samples of the formation have been trapped in the barrel 5. This tool consists of a casing 64, whose upper end is reduced, forming a bearing 65, and provided with fluid outlets v66, 66. A stem 67 operates through said bearing to the upper end of which a cable 68 is attached. To the lower end of this stem is secured a hood 69, of asize and form to fit over the head 49. Flexible fingers 71, 71, are secured at their lower ends to the inner side of the hood, and their upper ends are free. The fishing tool is let down into the drill stem by means of the cable 68, and the casing 64 passes over the head, and forces the fingers 51, 51, outwardly, disen aging them from the shoulder 48, and reeasing the spring 46, which immediately operates to withdraw the head 44 from between the upper ends of the blades 32. The casing then passes on downwardly, engaging against the outer edges of the blades 32, 32, and forcing them inwardly. The lower ends of the lingers 39, 39, operate against the sloped sides of the head 37, which overcomes the pressure of the sp1-lng 38, and thereupon the fingers 71, 71., engage under the head 4:9, as shown in Fig. 12. The entire device ma be then withdrawn from the drill stem by an up- Ward pull on the cable 68, carrying with it the samples trapped in the barrel 5.

What I claim'is:

1 The combination with a drill stem, and a blt attached to the lower end thereof, having a central bore, of a tubular barrel passing .through said bore, interengaging means carried by the stem and barrel, through whlch the rotation of the former is imparted to the latter, a tool carried by the lower end of the said barrel, and a trap within said tool, permitting the admission of the cuttings of said tool into said barrel, and trapping the same within the barrel.

2. The combination with a drill stem, and a bit secured thereto, having a central bore, of a supporting member, within the stem, whose lower end extends through said bore below the bit, a boring tool carried by the lower end of the said member, interengaging means carried by the stem and member, respectively, whereby rotation is imparted from the former to the latter, and a tra within said boring tool provided t'o permlt the passage of the cuttings from said tool into said member, and to retain said cuttings so admitted therein.

3. The combination with a drill stein, having a drill bit attached to the lower end thereof, provided with a central bore, of a tubular supporting member, projected through said bore, and extending below the bit, a boring tool carried by the lower end of said member, interengaging means carried by the drill stem and said` member, respectively, through which rotation is imparted from the former to the latter, means for locking the interengaging means of said member into engagement with the corresponding means of said stem, the interengaging means of said member being releasab e fromA the corresponding means of said stem, when said locking means is released.

4. The combination with a drill stem, having a drill bit attached to the lower end thereof, provided with a central bore, of a tubular member, within the stem projecting through said bore, a boring tool attached to the lower end of said tubular member, oppositely disposed ribs carried by the inner wall of theV stem, a pair of blades pivoted a't one end to said member, and working through slots therein, a mechanism operating against the blades to hold them projected through said slots and into enga ement with said ribs, whereby the tubu ar member is forced to rotate with the stem, and means for releasing saidV mechanism from said blades to permit the withdrawal thereof within Said tubular member.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

REDUS D. DODDS.

Witnesses:

E. V. HAnnwAr, IRENE BRUNs. 

